amy kellogg went to stonehenge west of london. there are doomsday scenarios that have been set up and talked about among various civilizations since the beginning of time. up until the end of time. so we explored at least three of the more significant ones. >> steve: and the mayan people, how did they come up with that number? was it just the fact that it's 12-21-2012? >> what they worked on was the movement of the sun and how it aligns itself every 365 days on the winter solstice. that's what they based everything on. it's a fascinating theory. the question is, what happens to your plans on december 22? >> alisyn: i don't know. what does? >> you got all the presents under the christmas tree? is it even significant? we look at all that and the doomsday scenario. >> steve: very nice. stay right here for just a moment. because we want to know what's on your program coming up in 14 minutes. >> brian: america's news room. >> i've got my partner, her name is martha mccallum. >> brian: where is she? >> this is usually the part of the da